| Guenter Roeck | 41082d6 | 2014-04-06 08:57:20 -0700 | [diff] [blame] | 1 | Kernel driver nct6683 |
| 2 | ===================== |
| 3 | |
| 4 | Supported chips: |
| 5 | * Nuvoton NCT6683D |
| 6 | Prefix: 'nct6683' |
| 7 | Addresses scanned: ISA address retrieved from Super I/O registers |
| 8 | Datasheet: Available from Nuvoton upon request |
| 9 | |
| 10 | Authors: |
| 11 | Guenter Roeck <linux@roeck-us.net> |
| 12 | |
| 13 | Description |
| 14 | ----------- |
| 15 | |
| 16 | This driver implements support for the Nuvoton NCT6683D eSIO chip. |
| 17 | |
| 18 | The chips implement up to shared 32 temperature and voltage sensors. |
| 19 | It supports up to 16 fan rotation sensors and up to 8 fan control engines. |
| 20 | |
| 21 | Temperatures are measured in degrees Celsius. Measurement resolution is |
| 22 | 0.5 degrees C. |
| 23 | |
| 24 | Voltage sensors (also known as IN sensors) report their values in millivolts. |
| 25 | |
| 26 | Fan rotation speeds are reported in RPM (rotations per minute). |
| 27 | |
| 28 | Usage Note |
| 29 | ---------- |
| 30 | |
| 31 | Limit register locations on Intel boards with EC firmware version 1.0 |
| 32 | build date 04/03/13 do not match the register locations in the Nuvoton |
| 33 | datasheet. Nuvoton confirms that Intel uses a special firmware version |
| 34 | with different register addresses. The specification describing the Intel |
| 35 | firmware is held under NDA by Nuvoton and Intel and not available |
| 36 | to the public. |
| 37 | |
| 38 | Some of the register locations can be reverse engineered; others are too |
| 39 | well hidden. Given this, writing any values from the operating system is |
| 40 | considered too risky with this firmware and has been disabled. All limits |
| 41 | must all be written from the BIOS. |
| 42 | |
| 43 | The driver has only been tested with the Intel firmware, and by default |
| 44 | only instantiates on Intel boards. To enable it on non-Intel boards, |
| 45 | set the 'force' module parameter to 1. |
| 46 | |
| 47 | Tested Boards and Firmware Versions |
| 48 | ----------------------------------- |
| 49 | |
| 50 | The driver has been reported to work with the following boards and |
| 51 | firmware versions. |
| 52 | |
| 53 | Board Firmware version |
| 54 | --------------------------------------------------------------- |
| 55 | Intel DH87RL NCT6683D EC firmware version 1.0 build 04/03/13 |
| 56 | Intel DH87MC NCT6683D EC firmware version 1.0 build 04/03/13 |
| 57 | Intel DB85FL NCT6683D EC firmware version 1.0 build 04/03/13 |